Elimination of spurious modes before the solution of quasiparticle random-phase-approximation equations
Elimination of spurious modes before the solution of quasiparticle random-phase-approximation equations
复制标题
在求解准粒子随机相位近似方程之前消除杂散模式
DOI：
10.1140/epja/i2019-12898-7
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
V. Nesterenko
中科院分区：
文献类型：
--
作者：
J. Kvasil;A. Repko;V. Nesterenko
本文提出了一种从两准粒子（2qp）内禀核激发中消除伪掺合物（SA）的一般方法。它假设2qp位形空间的构造与给定的寄生模式正交的元素。该方法利用准粒子随机相位近似（QRPA）矩阵，但不需要QRPA的先验数值解，即SA消除发生在QRPA方程求解之前。在精制基制备之后，它可以用于给定的矩阵QRPA。该方法适用于任何类型的寄生模式。我们证明了该方法的效率QRPA在轴向变形154 Sm。SA的情况下所产生的质心运动（状态），核旋转（状态），和配对诱导违反的粒子数（状态）被认为是。并与其它SA消元方案进行了比较。
A general method for the elimination of the spurious admixtures (SA) from two-quasiparticle (2qp) intrinsic nuclear excitations is proposed. It assumes the construction of 2qp configuration space with elements orthogonal to the given spurious mode. The method exploits Quasiparticle-Random-Phase-Approximation (QRPA) matrices but does not need a prior numerical solution of QRPA,i.e.SA-elimination occurs before QRPA equations are solved. After the refined basis is prepared, it can be used in the given matrix QRPA. The method is suitable for any type of spurious modes. We demonstrate the efficiency of the method for QRPA in axially deformed154Sm . The cases of SA arising from the center of mass motion (states), nuclear rotation (states), and pairing-induced violation of the particle number (states) are considered. The method is compared with other SA-elimination schemes.